7/29/2019 Aluminum Silicon Alloy.pdf

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Aluminium SiliconAlSi

Aluminium basedhigh concentration master alloys

AlSi.368.E.04

7/29/2019 Aluminum Silicon Alloy.pdf

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Aluminium SiliconAlSi

Application

Silicon is an important alloying element in

most medium strength and some high

strength wrought Aluminium alloys in the

international standard AA 6000 and AA

2000 series. It also features as a major

element in foundry casting alloys and in

brazing alloys.

The presence of Silicon in Aluminium

alloys:

imparts heat treatable properties in

balanced combination with Magnesium

enhances the fluidity of casting alloys

lowers the melting point for brazing

alloys

Although addition as elemental Silicon is

possible, the use of a master alloy offers

distinct advantages:

shorter dissolution times

alloying at lower temperatures

higher accuracy to meet specified

composition limits

improved metal yield.

Product description

AlSi master alloys are available in notched

waffle ingots of approximately 7 kg unit

weight. The ingots are

stacked on wooden

pallets, strapped and

shrink wrapped with

plastic foil to protect the

alloy against moisture.The master alloy is

colour coded according

to international

standards. Each pallet

carries a label showing

the batch number and

nominal alloy

composition.

Metallographic structure

The phase diagram indicates that Silicon is

present in two forms: the primary Silicon

crystals and the Aluminium-Silicon

eutectic. The primary Silicon phase isuniformly dispersed in the eutectic matrix.

Recommended addition practice

AlSi master alloys can be introduced to the

furnace at any time during the charging

and melting cycle. However, additions to a

molten bath of metal are recommended to

gain optimum yields. Thorough stirring

will ensure homogeneity. There is no

interference from other metal treatments.

Storage

The alloys must be stored in a dry area to

avoid excessive oxidation.

A Material Safety Data Sheet is available.

Composition

In weight percent:

Master alloy Si Fe max. Mn max. Ca max. Others each max. Derived from specification

AA CEN

AlSi25 23.0 - 27.0 0.40 0.15 0.10 0.05 - -

AlSi50 47.0 - 53.0 0.50 0.15 0.15 0.05 H2350 EN AM-91402

Other composition and packaging upon request.

For further information, please contact:

KBM AFFILIPS B.V.P.O. Box 799, 5340 AT Oss, The Netherlands

Tel: (31) 412 681311

Fax: (31) 412 635594

Company affiliated with KBM AFFILIPS Ltd. UK, Tel. (44) 1789 763233

KBM AFFILIPS is a wholly owned subsidiary of ROBA Holding B.V.

Copyright

1996KBMAFF

ILIPSB.V.

TheNetherlands2000.0

9.9

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- subject to change without notification -

AlSi25% 100x primary Si phase and Al-Si eutectic